Fire-doors for elevator-shafts.



J. E. & T. P. DONNELLY.

FIRE DooRs PoR BLEVATOR sHAPTs.

APPLIOATlON FILED APB.13, 1911.

1 ,O2 1,304. Patented Mar. 26, 1912.

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UNITED sTETEs PATENT oEEioE.

JOSEPH E. DONNELLY AND THOMAS F. DONNELLY, OF CLEVELAND, HIO.

FIRE-DOORS FOR ELEVATOR-SHAFTS.

Specification of Letters Patent.

Patented Mar. 26, 1912.

Application filed April 13, 1911.V Serial No. 620,904.

To all whom t may concern Be it known that we, Josemi. E. DoN- NELLY and THOMAS F. DONNELLY, citizens of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Iniproveinents in Fire-Doors for Elevator- Shafts, of which the following is a specification.

This invention relates to fire doors for elevator shafts, which will close automatically in the presence of tire or heat su'tlicient to melt fusible links which assist in holding the doors in open position.

The object of the invention is to provide an improved vertically slidable door made in sect-ions, said doors being respectively placed at the various floors of a building, and connected together in such manner that when one door closes the others will also be released and will close.

The operating devices include a trigger connected to each door and also connected to a main cable, by action of which all the doors are released and allowed to drop to closed position.

The invention is illustrated in the accompanying drawings in which- Figure 1 is an elevation of the doors and connections, the doors being in open position. Fig. 2 is a detail of a trigger.

As shown in Figs. 1 and 4l, the doorway at each floor is provided with one ot the doors hereinafter described. Each door consists of a series of panels or sections ofV limits the drop of the section which slides therein. Each section is partly balanced by a sash weight 12, connected thereto by a cord 13a passing over a pulley 13. The lowest section B has at its lower end an inwardly projecting arm 17, which projects t'ar enough to pick up all the other door sections as the lower' section B is raised. The top section F is stationary. The lower section B ot' each door is connected to a cable 30, having one or more fusible links 8 therein, and said cable extends over guide pulleys 9 to connect with one arm ot' a trigger 10, which consists ot' a bent lever pivoted at'its elbow to the wall or any suitable support. The connection. is effected by means ot a ring 22 which engages in a notch 23 in the arm, said arm also havingl a projection 24 to prevent the ring slipping down too far.

14 indicates a main line or tension cable, provided with a turn-buckle 6 for adjustment, and this cable extends through all the floors and is suitably fixed at its opposite ends. It passes over guide pulleys 9 at each floor to form a bightwhich receives a running sheave 11 connected by a short piece or cable 11"", which may also contain a fusible link S, to the other arm of the trigger 10, the connection being formed by a ring in a notch as above described. The panels will be made ot suitable fire proof material, such as corrugated metal 2O fastened-to an angle iron frame 21, the outer flange of which may be provided with rollers 19 to travel in the tracks.

In the use of the device, the panels are raised to open position as shown in Fig. 4, and the connections are made to the trigger 10 as above described. This holds the doors in open position, the cable 14 being taken up by the turn-buckle 6 if necessary, to provide the needed tension to hold the triggers as set. In case ot lire, one of the links 8 will he fused, thereby releasing the door at that floor, and the panels thereof will drop to closed position. This also will release the tension on the line 14, permitting the triggers to tilt or tip and allowing the links 22 to slip out of the notches 23 and thus release all the triggers, and accordingly allowing all the doors to drop and close almost simultaneously.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent is The combination of a plurality ot gravitating doors, a cable connected to each door and adapted to'support the same in open po- In testimony whereof, We do affix our signatures in presence of two Witnesses.

JOSEPH E, DONNELLY.v THOMAS F. DONNELLY. Witnesses:

JOI-1N A. BOMMHARDT, STEDMAN J. ROCKWELL.

sition and having a fusible link, a rocking trigger having a pair of notched arms to one of Which said cable has a slip connection, a main cable under tension, and a cable connected at one end to the main cable and having a slip connection at the other end` t to the other arm of the trigger.

Copies of this patent may b e o btained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C. 

